This is the CodeSystem that contains all the codes in ICPC2-ICD10 Thesaurus, Am Engl (http://terminology.hl7.org/CodeSystem/mth-icpc2-icd10-AE) and ICPC2-ICD10 Thesaurus, Am Engl (http://terminology.hl7.org/CodeSystem/mth-icpc2-icd10-AE). E.g. what you have to deal with if you get resources containing codes in either of them